Abstract
Early age detection of swelling pathologies in concrete by non-destructive testing (NDT) is a major concern for safety of concrete structures, especially in the case of nuclear power plants where core drilling is not allowed. This work is part of a program focusing on detection and 3D-quantification of swelling pathologies at early stages, for massive concrete structures. To reach this goal, three scales of concrete pieces are currently studied in order to pass from laboratory experiments to on site testing. The present paper is related to first scale and deals with the detection and the characterization by ultrasonic NDTs of Delayed Ettringite Formation occurring at a low expansion level. Linear acoustics (Resonant Ultrasonic Spectroscopy), nonlinear acoustics (Nonlinear Resonant Ultrasonic Spectroscopy), as well as a passive technique (Acoustic Emission), were tested on DEF-affected specimens (7×7×28 cm3). Microscopy and destructive micro-cracking analyses were also conducted. All the results are consistent but unexpected: early DEF does not create significant damage to these stress free samples while expansion reaches 0.21%.
How to Cite:
Ouvrier-Buffet, F. ., Garnier, V. ., Payan, C. ., Ranaivomanana, N. ., Durville, B. . & Marquié, C. ., (2019) “Nondestructive testing of concrete affected by swelling pathologies”, Review of Progress in Quantitative Nondestructive Evaluation .
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